Tub



FIG. 1 is a perspective view of a tub showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a first end view thereof; and,

FIG. 7 is a second end view thereof. 

CLAIM The ornamental design for a tub, as shown and described. 